JPH0432157A - Support device of coil filament - Google Patents

Abstract

PURPOSE:To eliminate the reduction in characteristic of a bulb at the time of using, and to eliminate the shortening of the longevity by winding an anchor in a coil form on a filament support part of the anchor, through a width wider than the pitch of the coil filament, or by fitting a coil of diameter larger than the pitch of the coil filament. CONSTITUTION:A double coil filament 10 is connected between leads 7 and 8 arranged in such a way that the lower part is buried in a glass beads 9, while the upper part is opposed upward and downward with each other. A coil-shaped filament support part 11a of the upper end of an anchor 11 buried in the beads 9 in its lower end, is arranged in the middle of the double coil filament 10, with a very small gap S. The upper end of the anchor 11 of the filament support part 11a is folded densely into a coil shape through a width W wider than a pitch P of the double coil filament 10. Even when the coil filament is vibrated in the loop of the anchor at the time of handling or carrying a product into which the present device is manufactured as a bulb, the support part of the anchor is not inserted into the pitch of the coil filament, and the coil filament is always situated in the loop of the anchor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an anchor that supports an intermediate portion of a coil filament for a tube.

[Prior art and its problems] In general, coil filaments for tubes connected between opposing lead wires are supported at the middle by anchors to prevent wire breakage due to vibration during transportation. While controlling the amplitude of the noise, it also provides a buffering effect. A thin wire is used for this anchor due to its purpose. As shown in FIGS. 6 and 7, a general support mechanism for supporting a coil filament with an anchor includes a coil filament 3 whose upper and lower ends are connected between a pair of upper and lower lead wires 12. It is known that the support part 4a of the upper end of the anchor 4 is wound around one loop of the intermediate part, and the lower end is buried in the beads 5. However, according to such a support mechanism, it is necessary to insert the upper end of the anchor 4 into one loop of the coil filament and then bend it using a jig, so this process not only requires skill. ,
Even if the process is performed by a skilled person, damage to the coil filament or wire breakage cannot be completely eliminated, and it is difficult to obtain a uniform product and it is also difficult to automate the process.

Against this background, recently, as shown in FIGS. 8 and 9, a mechanism has been adopted in which the support portion 6a at the upper end of the anchor 6 is bent into a loop shape so as to surround the coil filament 3. Through this, we aim to simplify and automate processes, homogenize products, and improve product yields. By adopting such a configuration, the problems of the conventional device described above can be solved, but as mentioned earlier, because the anchor is a thin wire due to its purpose, it is difficult to use it as a light bulb in the product. The supporting part 6a of the anchor 6 may get caught between the pitches of the coil filament 3 due to impact during handling or transportation of the product after it has become
The coil filament 3 may be in a curved and supported state as shown by the broken line in FIG. If a light bulb is used under these conditions, the linearity of the coil filament is lost, which not only causes a decline in the characteristics of the light bulb, but also shortens the life of the light bulb. have.

The present invention not only aims to simplify and automate the manufacturing process when manufacturing a filament support device, homogenize the product, and improve the yield of the product, but also when handling the product after it is commercialized as a light bulb. By adopting a structure that prevents the support part of the anchor from being pinched between the pitches of the coil filament due to shocks during transportation, etc., the characteristics of the light bulb will not be damaged when the light bulb is used, and its lifespan will be extended. The object is to obtain a support device for a coil filament that does not shorten.

[Means for Solving the Problems] In order to achieve the above object, in the coil filament support device of the present invention, the intermediate portion of the coil filament connected between the opposing lead wires is adjusted to the pitch of the coil filament. In a coil filament support device supported by a loop-shaped anchor made of thinner wire, the filament support part of the anchor that supports the coil filament is wound in a coil shape over a width wider than the pitch of the coil filament. Alternatively, a coil having a diameter larger than the pitch of the coil filaments is fitted into the filament support portion of the anchor that supports the coil filaments.

[Function] The loop-shaped support part of the anchor that supports the coil filament in the present invention is wound in a coil shape over a width wider than the pitch of the coil filament, or a coil having a diameter larger than the pitch of the coil filament is wound. Since the coil filament is inserted into the product as a light bulb, even if the coil filament swings within the loop of the anchor during handling or transportation, the supporting part of the anchor will not get caught within the pitch of the coil filament. The coil filament will always be located within the loop of the anchor.

[Example] Hereinafter, an example of the coil filament support device according to the present invention will be described based on the attached drawings.

In FIGS. 1 to 3, 7 and 8 are lead wires whose lower parts are buried in the glass beads 9 and whose upper ends are arranged facing each other vertically. The double coil filament IO is spliced using conventional methods. A coiled filament support part 11a at the upper end of the anchor 11 whose lower end is embedded in the bead 9 is arranged in the middle of the double coil filament 10 with a small gap S therebetween.

This filament support portion 11a has the upper end portion of the anchor 11 bent into a dense coil shape over a width (2) wider than the pitch P of the double coil filament IO.

4 and 5 show other embodiments of the filament support portion of the anchor 11, in which the loop-shaped filament support portion 11b has a pitch P of the coil filament 10.
A coil 12 having a larger outer diameter R is shown fitted therein.

In the drawings, the same reference numerals indicate the same configurations.

[Effects of the Invention] As described above, the present invention provides that the filament supporting portion of the anchor is wound in a coil shape over a width wider than the pinch of the coil filament, or has a diameter larger than the pitch of the coil filament. Since the structure consists of a coil that is fitted, it is possible to automate the process of forming the filament support part of the anchor, which not only does not require any processing by skilled workers, but also improves product homogeneity and product yield. In addition, the filament support part of the anchor will not be caught between the pitches of the coil filament even if the product is handled or transported after it has been commercialized as a light bulb.
There is no risk of deterioration of the characteristics of the light bulb or shortening of its life during use, and it is suitable as a support device for the coil filament.

[Brief explanation of the drawing]

1 to 5 show an embodiment of a coil filament support device according to the present invention, in which FIG. 1 is an overall view showing a state in which a coil filament is supported by an anchor, and FIG. 3 is a plan view of FIG. 2, FIG. 4 is a sectional view of the main part showing another embodiment, and FIG. 5 is an enlarged side view of the main part.
The figure is a perspective view of main parts. Figures 6 to 9 are side views of a conventional coil filament support device, Figure 6 is an overall view showing the state in which the coil filament is supported by an anchor, and Figure 7 is an enlarged view of its main parts. , FIG. 8 is an overall view of another example showing a state in which the coil filament is supported by the anchor and a state in which the coil filament is curved. FIG. , is an enlarged view showing a state where the coil filament is inserted between the pitches of the coil filament. 7.8... Lead wire IO... Coil filament 11... Anchor IIa, Ilb... Filament support part 12... Coil P... Pitch R... Outer diameter W... Width No. Figure 6 Figure 7

Claims (2)

[Claims] (1) The coil filament is supported in a coil filament support device in which the middle part of the coil filament connected between opposing lead wires is supported by a loop-shaped anchor made of a wire material thinner than the pitch of the coil filament. A coil filament support device characterized in that the filament support portion of the anchor is wound in a coil shape over a width wider than the pitch of the coil filament. (2) A coil having a diameter larger than the pitch of the coil filament is fitted into the filament support part of the anchor that supports the coil filament.
A coil filament support device according to claim (1).